<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        *{margin:0;padding: 0}
        .header{
            margin-top:10px;
            width:750px;
            height: 300px;
            margin-left: auto;
            margin-right: auto;
            border:1px solid #333;
            position: relative;
            overflow: hidden;
        }
        .bg{
            background: url('images/bg.webp') no-repeat center;
            height: 100%;
            background-size:100%;
            filter: blur(10px);
        }
        .blur{
            left:0;
            top:0;
            position: absolute;
            width:100%;
            height: 100%;
            z-index: 100;
            background: #fff;
            opacity: 0.3;
            
        }
        .content{
            position: absolute;
            left:0;
            top:0;
            width:100%;
            height: 100%;
            z-index: 120;
            color:#fff;
        }
    </style>
</head>
<body>
    <div class="header">
        <div class="bg"></div>
        <div class="blur">
        </div>
        <div class="content">
            <p>神奇动物在哪里</p>
        </div>
    </div>

</body>
</html>